“Yellowstone is like a conveyer belt of caldera clusters,” he says. “By investigating the patterns of behavior in two previously completed caldera cycles, we can suggest that the current activity of Yellowstone is on the dying cycle.”
Erik Klemetti posts an update on recent activity at Ubinas Volcano in Peru. In addition, some people have expressed concern about the recent magnitude 8.2 earthquake triggering an eruption at one of several nearby volcanos, Erik comments on these concerns plus, in another post, on the recent earthquake at Yellowstone.
“It might be the ugliest diamond you’ll ever see, but within this brown sliver of carbon is a gem of a find for a University of Alberta scientist working to unravel an ocean-sized mystery deep beneath the Earth.” Quoted from the University of Alberta press release.
An interesting article on “Diamonds and the Geology of Mantle Carbon” that considers the various types of diamonds, their host rocks, inclusions, geographic distribution, environments of formation, age, trace element composition, textures, carbon/nitrogen isotopes, geobarometry, and lots more.
Peridotite is a host rock of chromite, a source rock of diamonds, a potential sink for atmospheric carbon dioxide and the rock that makes up much of Earth’s mantle. Did you realize it was so important?
An article on the Smithsonian.com website looks back at the New Madrid, Missouri earthquakes of 1811 and 1812 (the strongest earthquakes in the recorded history of the conterminous 48 states) and looks forward to the possibility that similar events might occur in the future.
“The Northridge 20 Virtual Exhibit website presents teachable moments – to learn and reflect, to share and to act. Teeming with content, graphics and video recounting the events of January 1994, this exhibit seeks to empower and motivate us to make ourselves safer in future earthquakes.” Quoted from EarthquakeCountry.org.
“The Atlas Mountains defy the standard model for mountain structure in which high topography must have deep roots for support, according to a new study from Earth scientists at USC.” Quoted from the University of Southern California press release.
“Arizona makes up a tiny fraction of the land surface on Earth. However, it has had a comparatively larger impact on the evolution of geologic concepts, especially in three areas of geologic inquiry: (1) porphyry copper deposits, (2) metamorphic core complexes, and (3) evolution of large rivers.” Quoted from the Arizona Geology article.
“An investigation of the most powerful earthquake ever recorded deep within the Earth suggests deep quakes may be better at dissipating pent-up energy than similar quakes near the surface.” Quoted from the NBC News story.
“The Center for Geoscience Education and Public Understanding at the American Geosciences Institute has released a landmark report on the status of Earth Science education in U.S. middle and high schools, describing in detail significant gaps between identified priorities and lagging practice.” Quoted from the AGI press release.
“University at Buffalo researchers are developing a deep-sea Internet. The technological breakthrough could lead to improvements in tsunami detection, offshore oil and natural gas exploration, surveillance, pollution monitoring and other activities.” Quoted from the University at Buffalo press release.
At least 200 people were killed by a magnitude 7.7 earthquake in Pakistan’s Baluchistan province.
There is a report that a mud volcano formed an island off the coast in the Arabian Sea at the same time that the earthquake was occurring. The Weather Channel video has comments on this from a USGS scientist.
“A magnitude 8.3 earthquake that struck deep beneath the Sea of Okhotsk on May 24, 2013, has left seismologists struggling to explain how it happened. At a depth of about 609 kilometers (378 miles), the intense pressure on the fault should inhibit the kind of rupture that took place.” Quoted from the University of California Santa Cruz press release.
“We currently don’t have any way to remotely monitor when land faults are about to move” [...] “This has the potential to change the game for earthquake monitoring and prediction, because if it is right and you can make the right predictions, it could be big.”
“Reservoirs of silica-rich magma — the kind that causes the most explosive volcanic eruptions — can persist in the Earth’s upper crust for hundreds of thousands of years without triggering an eruption, according to new University of Washington research.”
“Even when they occur in remote areas, large landslides can dam rivers and lead to devastating downstream floods. [...]
Automated earthquake detection systems are tuned to monitor intense, “short-period” waves produced by sudden slips along tectonic faults. Landslides produce seismic waves as well, though their short-period signal is weak. Instead, they make powerful long-period waves that are sometimes detectable at great distances.” Quoted from the Earth Observatory article.
“When 13-story Warren Hall is imploded by demolition experts this weekend on the Hayward campus of California State University, East Bay, U.S. Geological Survey scientists will monitor the pulse of energy on nearly 600 seismometers temporarily placed in a two-mile radius around the building with help from hundreds of citizen-scientist hosts and volunteers.” Quoted from the USGS website.
“The number of earthquakes has increased dramatically over the past few years within the central and eastern United States. [...] This increase in earthquakes prompts two important questions: Are they natural, or man-made?” Quoted from the USGS blog post.
“But there remains one lingering mystery: If the Earth arose from the collision of asteroids, its composition should resemble that of meteoroids, the small particles that break off from asteroids. But to date, scientists have found that, quite literally, something doesn’t add up: Namely, the Earth’s mantle — the layer between the planet’s crust and core — is missing an amount of lead found in meteorites whose composition has been analyzed following impact with the Earth.” Quoted from the MIT press release.
“In particular, the southeast region of Tharsis bears strong resemblance in structure and topography to eastern Tibet. High topography and thick crust of eastern Tibet produces long, low-gradient plateau margins that may be caused by the flow of weakened lower crust. This has me thinking: if the lower crust flows in Tibet, did it do so on Mars?” Quoted from the Speaking of Geoscience article.
Researchers have discovered evidence of life 500 meters below the seafloor of the Juan de Fuca Ridge. “They found genetic evidence of Methanosarcinales, anaerobic archaea known to metabolize methane. Further experiments showed that microbes have affected the chemical signature of sulfur in the host basalt, suggesting they could harness energy from the breakdown of sulfates.” Quoted from the Deep Carbon Observatory press release.
“Forecasting volcanic eruptions with success is heavily dependent on recognizing well-established patterns of pre-eruption unrest in the monitoring data. But in order to develop better monitoring procedures, it is also crucial to understand volcanic eruptions that deviate from these patterns.” Quoted from the Carnegie Institution for Science press release.
“Scientists at Scripps Institution of Oceanography at UC San Diego have found a layer of liquefied molten rock in Earth’s mantle that may be acting as a lubricant for the sliding motions of the planet’s massive tectonic plates.” Quoted from the Scripps press release.
“Magma forms far deeper than geologists previously thought. [...] A study simulating pressures in the mantle beneath the ocean floor shows that rocks can melt at depths up to 250 kilometers.” Quoted from the NSF press release.
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Homeowners Insurance usually does not cover damage caused by floods, landslides, earthquakes and other geohazards.
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